R-4 Pro: The unit shuts down even when using AC power
If the R-4 Pro displays a “Battery Low” message and then shuts down even though an AC adapter is connected, check the EXT-POWER setting.
If this parameter does not match the actual power source, the unit may incorrectly detect the power condition and display a Battery Low warning before shutting down.
When using an AC adapter, set EXT-POWER to Adapter.
Procedure
- Press [SYSTEM].
- Select 5 System Setup → Ext-Power.
- Set Ext-Power to Adapter.
For details, refer to “Using external power sources” in the R-4 Pro Owner's Manual.